Moscow police have detained over 200 undocumented foreigners who lived and worked in an underground city made to keep them off the radar of city and federal officials - with a cafe, movie theater, casino and chicken coop.

When police raided the 'city' hidden beneath a market in the
capital, they discovered a vast garment complex with 122 sewing
machines.

While the workers -181 Vietnamese and 88 Central Asians - were
sewing brand-name clothes around the clock, people above ground
had no clue what was happening just under their feet. From
outside, the underground tailor shops looked like a normal
transport garage.

There was also time for entertainment in the hidden city. Police
found one room designed to be a Turkish café, with an oven and
brazier. There was also a movie theater with 35 seats and a poker
room.

The raid itself was carried out on May 31, but police only
recently released video footage of the underground complex.

Raids on migrants are frequent in Russia’s capital, as Moscow is
a destination for millions of people from the former Soviet Union
and beyond seeking better work than is available at home.

According to some estimates, Moscow is home to 10 migrants
working without a registration for every one working legally. The
Federal Migration Service believes that as many as 3 million
undocumented migrants may currently reside in Russia.

In 2012, federal authorities deported 16,000 foreigners from the
city for working without permits to do so.